Roll for cutting expanded metal.



m. 71mm. Patented Oct. 14, l90 2. o. BRADFORD.

ROLL FOR CUTTING EXPANDED METAL. {Application filed Apr. 20, 1901.) (No Model.)

WITNESSES f INVENTQR (CW4 W A TTORNE Y5 of their thickness.

forming them on the sides of the rings.

' UNITED STATES PATENT OFFICE.

OSCAR BRADFORD, OF CHICAGC, ILLINOIS, ASSIGNOR TO HIMSELF, AND

' WILLIAM L. CALDWELL, OF NEW YORK, N. Y.

ROLL FoR CUTTlNG EXPANDED META-L.

SPECIFICATION forming part of Letters Patent No. 711,416, dated October 14, 1902.

- Application filed April 20, 1901. Serial No, 56,701. on model.)

T0 at whom it may concern:

Be it known that I, OSCAR BRADFORD, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Rolls for Cutting Expanded Metal, of which the following is a specification.

This invention relates to the rolls of machines whereby sheet metal may be cut or slit preparatory to expanding it. It is a modifie cation of and in some respects an improvement upon the construction of the. cuttingrolls shown in the patent to Lewis E. Curtis,

dated April 9, 1901, and numbered 671,915. In the said patented construction the cuttingrings of both rolls are spaced apart, so that those of one roll may enter between the rings of the other roll, and their edges are square, forming right angled cutting corners all around their peripheries, except where the corners are interrupted by notches cut in the side faces of the rings and extending only part Way through the rings in the direction These notches may be formed on both sides of the rings of oneroll, or, if preferred, upon one side only of the rings of both rolls. 'In the Curtis construction both edges of the rings act as cutters at all times.

In ny present invention insteadof using rings of sufficient width to enable both corners to act as cutters at the'same time, I make the rings thinner and in two parts instead of one and use them in pairs, giving them rightangledcutting-corners at both sides, but employing but one edge only of each ring of each pair at the same time I also extend the notches by which the cutting action is inter rupted entirely across such ofthe rings as require to be notched and from their peripheries inward in radial directions instead if s the rings are used in pairs, thenotches upon one of them are arranged opposite an unnotched portion of the other, so that although both of the'mmay be'notched, yet no notch extends across both of them, and hence I thus obtain the, same effect as is obtained by notching the rings on their sides instead of their peripheries and at the same time am enabled to provide the rings with interrupted .20 is acting at any one time.

right-angled cutting-corners similar to those shown by Curtis. rings are each given right-angled cutting-corners at both'sides, so that by reversing them after the corners on one side are dulled the sharp corner on the other side may be brought into use before any sharpening, and both corners may be sharpened at the same time.

The invention will'be more fully understood froin the accompanying drawings, in which I show at Figurel a side elevation of the two coactingcutting-rings embodying my invention. v v one of the cutting-rolls, showing a pair of cutting-rings. Fig. 3 is a partial edge view of a modified construction, showing portions of the rings upon both rolls. Referring now to the construction show at Figs. 1 and 2, 20 20 represent a pair ofcutting-rings, both notched across their periph cries and radially inward, as shown at 21, the notches extending from side to side of the rings and the notches of one ring being staggered with reference to the notches of the other ring.- The peripheries, except-wherethey are interrupted by the notches, are at Fig. 2 is a partial edge view of By my construction the I I that both the outer corners of both rings willform sharp right-angled cuttingmorners. The rings are keyed to the roll by key 22. As already stated, a pair of these rings 20 takes the place of each Curtis ring, which cuts at both edges at the same time, while by my construction only one edge of each ring Being sharp at both corners, the rings can be reversed after the dulling of one corner, and thus bring a sharp corner into use without any sharpening. At the same time the rings can be sharpened in the same manner as the Curtis rings. Between the several pairs of rings 20 I place spacing 23, which serve the same purpose as in the Curtis rolls. And where both of each pair of rings are notched as in Fig. 2, the opposing roll is provided with rings 24, with interrupted peripheries adapted to en-' ter the spaces between the pairs 20.- These rings 24, may be divided into pairs similarly to the notched rings, if preferred; but that is not'necessary.

In the modifiedrconstruction.of Fig. 3 I

' only one ring in each pair.

figure, 25 and 26 represent a pair of the rings on the upper roll, and 27 and 28 the rings on s. a making "of the rings described in one piece divide the cutting-rings of both rolls into pairs and notch in the manner described, Thus in s id the lower roll. All have right-angled cut= ting-corners, and the rings 25 and 27, being one of each pair, are provided with 'notches 2,1,whil'e the other or mate rings 26 and 28 have continuous or 4 uninterrupted peripheries. The pairs of rings are spaced apart by spacing-rings '23 in the same manner as in the other construction. 7

Of course it will ,be understood that I do not wish to be limited in my claims to the gregate thickness of which equals the width.

of a strand in the slitte'd metal, the outer corners of each cutter being adapted to coact- 1 each cutter being notched across the peripheryso as to interrupt the cutting at proper points, substantially as specified.

2. The slitting-roll for cutting expanded metal provided with a series of spaced outters, eachcutter consisting of a plurality of rings placed together side by side and the ag gregate thickness of which equals the width of a strand in the slitted metal, the outer corners of each cutter being adapted to coact with the cutters of an opposing roll in forming the slits, and one or more of the rings in each cutter being notched across the periphery so as to interrupt the cutting at proper points, in combination with said opposing roll having cutters coacting with those of the first-mentioned roll, substantially as specified.

,v OSCAR BRADFORD. tl 'itnesses:

EDW. S. EVARTS, H. M. MUNDAY. 

